The new smartphone data plans include AT&T Data Plus 300 MB, which offers 300 MB for $20; AT&T Data Pro 3 GB, which offers 3 GB for $30, and AT&T Data Pro 5 GB, which offers 5 GB for $50 with mobile hotspot/tethering. For those that need more data, AT&T Data Plus customers can receive an extra 300 MB for $20 extra, and AT&T Data Pro 3 GB or 5 GB customers can pay an extra $10 per additional gigabyte. Customers can also choose to keep current plans.

The new tablet data plans include AT&T DataConnect 3 GB, which offers 3 GB for $30, and AT&T DataConnect 5 GB, which offers 5 GB for $50. The current 250 MB for $14.99 plan will also be an option.

"Customers are using more data than ever before," said David Christopher, chief marketing officer of AT&T Mobility and Consumer Markets. "Our new plans are driven by this increasing demand in a highly competitive environment, and continue to deliver a great value to customers, especially as we continue our 4G LTE deployment."

AT&T will even help customers out by sending alerts when they start to near their 300 MB, 3 GB or 5 GB data cap. This is the first change to AT&T's plans since June 2010.

Data certainly is in high demand. According to a recent survey by mobile network equipment maker Ericsson, 40 percent of smartphone users would access mobile broadband connections before even getting out of bed last year. It also predicts that global mobile data use will increase tenfold from 2011 to 2016.

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